the united states. north korean leaders say the tests are designed to strike and attack the united states, referring to america, as its sworn enemy. the next north korean nuclear test will be its third, and it could come as early as next month. >>> and now onto the gun control debate. the senate judiciary committee holds hearings this month. vice president biden will head there. today senator dianne feinstein takes on one of the most contentious gun ban issues. nancy cortes reports. >> reporter: this legislation is seen by many democrats as the first step in strengthening gun laws, but it's also the most controversial. it's called the assaults weapons ban of 2013 and it would reinstate the assault weapons ban that was allowed to lapse back in 2004. it would also restrict the number of bullets in high-capacity magazines. this is legislation that has been waiting in the wings for quite some time, but the lead sponsor, senator dianne feinstein of california is introducing it now in the wake of the sandy ho